{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-50287: Missing Authentication for Critical Function in @agenticmail/mcp","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-50287","status":"final","version":"1","initial_release_date":"2026-06-12T18:44:48.313Z","current_release_date":"2026-06-15T18:18:24.876Z","revision_history":[{"date":"2026-06-12T18:44:48.313Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can initialize a session and call tools directly. This issue has been patched in version 0.9.27.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-50287 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-50287"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-50287"},{"category":"external","summary":"https://github.com/agenticmail/agenticmail/security/advisories/GHSA-63gr-g7jc-v8rg","url":"https://github.com/agenticmail/agenticmail/security/advisories/GHSA-63gr-g7jc-v8rg"}]},"product_tree":{"branches":[{"category":"vendor","name":"agenticmail","branches":[{"category":"product_name","name":"agenticmail","branches":[{"category":"product_version","name":"< 0.9.27","product":{"name":"agenticmail agenticmail < 0.9.27","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:agenticmail:agenticmail:\\<_0.9.27:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-50287","title":"Missing Authentication for Critical Function in @agenticmail/mcp","notes":[{"category":"description","text":"AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can initialize a session and call tools directly. This issue has been patched in version 0.9.27.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","baseScore":8.7,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}